GT250k Rectifier

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malky
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GT250k Rectifier

Post by malky »

hi all - having problems with the five wire rectifier on a GT250K - I've got a three wire type from a GT500 - does anyone know if this can be used with a few mods to the wiring -
Mal.
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jabcb
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Re: GT250k Rectifier

Post by jabcb »

With some rewiring you can use the GT500 rectifier. The GT500 rectifier grounds through the mounting stud, so that needs to be a good ground.

An alternative would be to use a modern single-phase rectifier/regulator. The modern unit is around 8% more efficient so you get a smidgen more output. It also regulates the max voltage so you can safely use a maintenance free battery.

Stock, the GT250K does not have a voltage regulator & you shouldn’t use a modern maintenance free or AGM battery.
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

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joethebike
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Re: GT250k Rectifier

Post by joethebike »

Fitting a Tympanium rectifier/regulator fixed a lot of problems on my T350.
1972 Suzuki T350 160,000km +2 Castrol 6 Hour races
1982 Honda CX500 EC 272,700km
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jabcb
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Re: GT250k Rectifier

Post by jabcb »

We used a Tympanium R/R on the GT250 cafe project.
I have some pics in another topic that shows how to wire it up. Those pics were trashed by the Photobucket policy change. Let me know if you need the pics & I’ll upload them to Flickr & repost them.
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
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malky
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Re: GT250k Rectifier

Post by malky »

Thanks guys -think got it sussed spliced the red lead in to two for battery pos lead and also the two red/ green leads - battery now charging but alternator seems to be getting a bit hot -is the way I have wired it up correct ?
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Re: GT250k Rectifier

Post by dollydog »

i used a solid state reg/rec on mine and it works perfectly - just remember to get a single phase one though - and put an inline fuse on the live wire :D for some reason the 250's had no regulator, as jabcb said, they used the battery voltage as the regulator - don't ask me how. mine was a suzuki one, not one of the little square ones, and i use a gel battery, which has been no problem.
cheers, dd.
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jabcb
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Re: GT250k Rectifier

Post by jabcb »

Wiring should look something like this:
Image

What do you mean by a bit hot?
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
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malky
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Suzuki 2-Strokes: GT750A T500K T500L GT500A GT185A RV125L COLLE
Location: south wales uk

Re: GT250k Rectifier

Post by malky »

Thanks jabcb that's the way have it wired - when I say it's a bit hot it's just that the casings feel hot there again the bike had just done a ten mile run I'll check it again at the weekend
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malky
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Re: GT250k Rectifier

Post by malky »

all sorted - thanks guys its charging fine now but has now blown its crank seals - ah well you cant have it all
Mal :cry:
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